American Audio Mixer 19 MXR User Manual

							left	side	 of	the	 mixer.	 Samples	 4-6		are	stored	 under	Cue	buttons	 1-3	located	 on	the	 right	 side	of	the	 board.	 The	
Controller	Mode	Button	LED	will	blink	when	the	Sampler	is	active.
10. MASTER VOLUME LEVEL INDICATORS - The	dual	 MASTER	 LEVEL	LED	indicators	 are	used	 to	detail	 the	
master	output	level.	The	meters	will	detail	the	output	level	of	both	the	left	and	right	channels.
11. CUE MIXING CONTROL - This	functions	 allows	you	to	monitor	 the	Cue	 level	 as	well	 as	the	 Program	 (main	
output)	level	in	your	 headphones.	 A	channels	 Cue	Level	 may	only	be	monitored	 if	the	 channels	CUE (4) func-
tion	 is	selected.	 To	select	 a	channels	 cue	function	 press	the CUE BUTTON (4) that	is	directly	 associated	 with	
the	specific	 channel	 you	wish	 to	monitor.	 You	may	 use	the	mixing	 function	 to	blend	 both	the	Cue	 level	 and	the	
Program	 level	together.	 You	can	vary	 the	output	 level	to	either	 hear	more	 or	less	 of	either	 of	the	 two	 levels.	
Turning	the	 Cue	 Mixing	knob	to	 the	 CUE	 position	 (left)	will	allow	 you	to	hear	 more	 of	the	 Cue	 level.	Turning	the	
knob	 to	the	 PGM position	 (right)	will	allow	 you	to	hear	 more	 of	the	 Program	 level	(main	 output).	 You	may	 also	
use	the	Cue	 Mixing	 Control	 to	hear	 either	 the	Cue	 level	 or	the	 Program	 level	exclusively.	 If	the	knob	is	 in	 the	
full	 CUE	 position	 you	will	only	 hear	 the	cue	 level,	 if	the	knob	is	 in	 the	 full	PGM	 position	 you	will	only	 hear	 the	
main	 output.	 This	function	 is	especially	 useful	when	mixing	 without	 an	monitor.		
12.  HEADPHONE JACK - This	 jack	is	used	 to	connect	 your	headphones	 to	the	 mixer	 allowing	 you	to	monitor	
the	 cue	 source.	 Use	headphones	 only	rated	 at	8	ohms	 to	32	 ohms.	 Most	DJ	headphones	 are	rated	 at	16	 ohm,	
these	 are	highly	 recommended.	 Always	be	sure	 the	CUE LEVEL VOLUME (6) is	set	 to	minimum	 before	you	put	
the	headphones	on.
13. CHANNEL VOLUME FADER - These	 faders	 are	used	 to	control	 the	output	 signal	of	any	 source	 assigned	
to	its	particular	channel.	However,	master	volume	is	controlled	by	the MASTER VOLUME CONTROL (7).
14.  FEATHER FADER PLUS CROSSFADER - This	fader	 is	used	 to	blend	 the	output	 signals	 of	channels	 one	
and	two	together.	 When	the	fader	 is	in	 the	 full	left	 position	 (channel	 1),	the	 output	 signal	of	channel	 one	will	be	
controlled	 by	the	 master	 volume	 level.	The	same	 fundamentals	 will	apply	 for	channel	 two.	Sliding	 the	fader	 from	
one	position	 to	another	 will	vary	 the	output	 signals	 of	channels	 one	and	 two	respectively.	 When	the	crossfader	
is	set	in	the	center	position,	the	output	signals	of	both	the	channels	one	and	channels	two	will	be	even.
15. FADER ASSIGN KNOB - This	knob	assigns	 a	channel	 to	the	CROSSFADER (14).	When	 a	channel	 is	
assigned	 to	the	 left	side	 of	the	CROSSFADER (14) that	 channels	 output	level	is	routed	 to	and	 controlled	 by	the	
CROSSFADER (14).	Sliding	 the	CROSSFADER (14)	to	 left	 position	 will	send	the	volume	 output	of	the	assigned 
channel to	 the MASTER VOLUME LEVEL (7), siding	 the	CROSSFADER (14) to	right	 position	 will	cut	that	 chan-
nels volume to MASTER VOLUME LEVEL (7). The	reverse	 is	true	 for	the	 right	 channel	 fader	assign	 switch.	 When	
the	assign	switch	is	set	to	the	“OFF”	position	the	crossfader	will	have	no	function.
16.  CROSSFADER CURVE ADJUSTMENT - This	rotary	 knob	is	used	 to	change	 the	way	 the	crossfader	 will	
operate.	The	crossfader	 can	operate	 in	different	 modes,	“NORMAL	 CURVE”,	“QUICK	CURVE”	 or	any	 variation	
of	the	two.	(Quick	Curve	usually	used	for	scratching).
17. CUE, SYNC, PITCH BEND, & PLAY/PAUSE -
     CUE 1, 2, & 3 - These buttons will set or trigger hot cue 1, 2, or 3.
    DELETING HOT CUE POINTS - If a hot cue point is set, it is indicated by a lit Cue button LED. If you wish 
    to delete a hot cue point, press the Shift button. The shift button LED will flash along with the Cue LEDs. 
    Press the Cue button that contains the hot cue you wish to delete. After, press the Shift button  again to 
    disable the soft shift..
    PITCH BEND - To perform temporary pitch bends in Virtual DJ, hold the Shift button and Cue 1 to slow the   
    track. To speed up the track hold the Shift button and press the Cue 3 button. To reset the pitch, hold the      
 
    Shift button and press Cue 2.
    SYNC - Will sync the selected deck to the opposite deck or master deck/tempo.
    CUE - When the deck is playing, pressing this button will return to the 1st cue point. If the deck is           
 
     paused, pressing Cue will set a new cue point.
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 19MXR                       CONTROLS AND FUNCTIONS cont. 
						

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18. MICROPHONE 1 - 	This	 combo	 jack	will	accept	 a	standard	 1/4	plug	 or	XLR	 3-pin	 balanced	 male	plug.	 The	
volume	 output	level	for	this	 microphone	 will	be	controlled	 by	its	own	 respective	MICROPHONE GAIN CON-
TROL (1). Note: We recommend that you use a 500-600ohm microphone for the best sound quality.
19. MICROPHONE 2 - 	This	 jack	accepts	 a	standard	 1/4	plug.	 The	volume	 output	level	for	this	 microphone	 will	
be	controlled	 by	its	own	 respective	MICROPHONE GAIN CONTROL (1). Note: We recommend that you use 
a 500-600ohm microphone for the best sound quality.
20. MICROPHONE 3 - 	This	 jack	accepts	 a	standard	 1/4	plug.	This	 microphone	 will	be	controlled	 through	
the	Channel	 4	fader.	The	 Channel	 4	EQ	 will	 also	 effect	 the	microphone	 output.	Be	sure	 to	flip	 the SOURCE 
SELECTOR SWITCH (3) to	the	 “MIC	 3”	position	 to	operate	 this	microphone’s	 input	signal. Note: We recom-
mend that you use a 500-600ohm microphone for the best sound quality.
21. CHANNEL 1: LINE 1 INPUT JACKS - DO NOT CONNECT TURNTABLES TO THESE JACKS!	CD	 players, 	
Tape	Decks	 and	other	 line	level	 instruments	 may	be	connected	 to	these	 jacks.	 The	red	colored	 RCA	jack	rep-
resents	 the	right	 channel	 input	and	the	white	 represents	 the	left	channel	 input.	Input	volume	 will	be	controlled 	
by	channel	 one	fader. The	channel SOURCE SELECTOR SWITCH (3) must	 be	in	the	 “Analog”	 position,	to	
monitor	any	source	connected	to	these	jacks.
22. CHANNEL 2: INPUTS - The	 type	 of	input	 must	directly	 reflect	the	selected	 mode	of	the CHANNEL LINE 
LEVEL SELECTOR SWITCH (23). CD	 players,	 Tape	Decks	 and	other	 line	level	 instruments	 may	be	connected 	
to	these	 jacks.	 The	red	colored	 RCA	jack	represents	 the	right	 channel	 input	and	the	white	 represents	 the	
left	 channel	 input.	Input	volume	 will	be	controlled	 by	channel	 two fader. The	channel SOURCE SELECTOR 
SWITCH (3) must	 be	in	the	 “Analog”	 position,	to	monitor	 any	source	 connected	 to	these	 jacks.	 Turntables 	
equipped	with	MM	pickup	 cartridge	 (All	DJ	turntable	 use	MM	 pick-up	 cartridges)	 may	be	connected	 to	these 	
jacks	 as	long	 as	the	CHANNEL LINE LEVEL SELECTOR SWITCH (23)	is	 in	 the	 “PHONO”	 position.	When	CD	
players,	 Tape	Decks	 and	other	 line	level	 instruments	 are	connected	 to	these	 jacks	the	CHANNEL LINE LEVEL 
SELECTOR SWITCH (23) is	in	 the	 “LINE”	 position.	 Never	connect	 line	level	 instruments	 (CD	players,	 tape	
decks,	 etc.)	to	these	 jacks	when	 the	CHANNEL LINE LEVEL SELECTOR SWITCH (23)	is	 in	 the	 “PHONO” 	
position, THIS MAY SERIOUSLY DAMAGE YOUR MIXER! The	red	colored	 RCA	jack	represents	 the	right 	
channel	 input	and	the	white	 represents	 the	left	channel	 input.	The	channel SOURCE SELECTOR SWITCH (3)
must	be	in	the	“Analog”	position,	to	monitor	any	source	connected	to	these	jacks.
23. GND (GROUND TERMINAL) - Be	sure	 to	connect	 turntable	 ground	leads	to	either	 or	both	 of	the	 two	
available	ground	terminals.	This	will	reduce	the	humming	associated	with	magnetic	phono	cartridges.
      CHANNEL  LINE LEVEL SELECTOR SWITCHES - These	 switches	 are	used	 to	change	 the	voltage	 line	
levels	 of	there	 respected	 	 Phono	/	Line	 RCA	 inputs	 jacks.	When	connecting	 turntables	with	magnetic	 car-
tridges	to	these	 jacks	be	sure	 the	corresponding	 switch	is	in	 the	 “PHONO”	 position,	and	when	 using	 line	
REAR PANEL
 19MXR                       CONTROLS AND FUNCTIONS cont. 
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level	input	 devices	 be	sure	 this	switch	 is	in	 the	 “LINE”	 position.	 Always	be	sure	 main	 power	 is	shut	 off	before 	
change	the	position	of	the	Line	Level	Selector	Switch.
24. CHANNEL 3: INPUTS - The	type	 of	input	 must	directly	 reflect	the	selected	 mode	of	the CHANNEL LINE 
LEVEL SELECTOR SWITCH (23). CD	 players,	 Tape	Decks	 and	other	 line	level	 instruments	 may	be	connected 	
to	these	 jacks.	 The	red	colored	 RCA	jack	represents	 the	right	 channel	 input	and	the	white	 represents	 the	
left	 channel	 input.	Input	volume	 will	be	controlled	 by	channel	 three fader. The	channel SOURCE SELECTOR 
SWITCH (3) must	 be	in	the	 “Analog”	 position,	to	monitor	 any	source	 connected	 to	these	 jacks.	 Turntables 	
equipped	with	MM	pickup	 cartridge	 (All	DJ	turntable	 use	MM	 pick-up	 cartridges)	 may	be	connected	 to	these 	
jacks	 as	long	 as	the	CHANNEL LINE LEVEL SELECTOR SWITCH (23)	is	 in	 the	 “PHONO”	 position.	When	CD	
players,	 Tape	Decks	 and	other	 line	level	 instruments	 are	connected	 to	these	 jacks	the	CHANNEL LINE LEVEL 
SELECTOR SWITCH (23) is	in	 the	 “LINE”	 position.	 Never	connect	 line	level	 instruments	 (CD	players,	 tape	
decks,	 etc.)	to	these	 jacks	when	 the	CHANNEL LINE LEVEL SELECTOR SWITCH (23)	is	 in	 the	 “PHONO” 	
position, THIS MAY SERIOUSLY DAMAGE YOUR MIXER! The	red	colored	 RCA	jack	represents	 the	right 	
channel	 input	and	the	white	 represents	 the	left	channel	 input.	The	channel SOURCE SELECTOR SWITCH (3) 
must	be	in	the	“Analog”	position,	to	monitor	any	source	connected	to	these	jacks.
25. CHANNEL 4: LINE 4 INPUT JACKS - DO NOT CONNECT TURNTABLES TO THESE JACKS!	CD	 players, 	
Tape	Decks	 and	other	 line	level	 instruments	 may	be	connected	 to	these	 jacks.	 The	red	colored	 RCA	jack	rep-
resents	 the	right	 channel	 input	and	the	white	 represents	 the	left	channel	 input.	Input	volume	 will	be	controlled 	
by	channel	 one	fader. The	channel SOURCE SELECTOR SWITCH (3) must	 be	in	the	 “Analog”	 position,	to	
monitor	any	source	connected	to	these	jacks.
26. RCA MASTER OUTPUTS - The	 Master	 Output	 includes	 a	pair XLR BALANCED JACKS (28) as well as 
a	pair	 of	RCA Unbalanced	 Jacks.	The	RCA	 jacks	 send	a	low	 current	 unbalanced	 output	signal.	These	jacks	
should	 only	be	used	 for	shorter	 cable	runs	to	signal	 processors	 or	looping	 to	another	 mixer.	For	cable	 runs	
greater	 than	15	feet	 use	the XLR BALANCED JACKS (28).
27. BOOTH OUTPUTS -	The	 VMS4	 offers	a	secondary	 output	usually	 used	to	monitor	 your	mix	or	to	route	
to	an	 outboard	 recording	 device.	This	output	 has	independent	 volume	control	“Booth”	 knob.
28. BALANCED XLR MASTER OUTPUT JACKS - The	Master	 Output	 includes	 a	pair	 of	XLR	 Balanced	 jacks	
as	well	 as	a	pair	 of	RCA UNBALANCED JACKS (26).	The	 3-pin	 XLR	jacks	 send	a	high	 current	 balanced 	
output	signal.	These	jacks	should	 be	used	 when	 you	will	be	driving	 an	amp	 or	other	 audio	 equipment	 with	
a	balanced	 input,	or	whenever	 you	will	be	running	 a	signal	 line	greater	 than	15	feet.	 Always,	 use	these	 jacks	
whenever	 possible. 
29. USB PORT -	Connect	 to	your	 computer	 for	MIDI	 interface	 and	USB	 interface	 (audio	in	and	 outs).
30.  MAIN POWER SWITCH - This	 is	the	 main	 power	 ON/OFF	 button.	Before	main	power	 is	applied,	 be	
sure	you	have	 made	 all	connections	 to	the	 mixer.	 Also	be	sure	 your	 amplifier(s)	 is(are)	tuned	off.	Remember	
to	avoid	 damaging	 pops	to	the	 speakers,	 the	mixer	 is	turned	 on	first	 and	 turned	 off	last.	
31. AC CONNECTION - This	 connector	 is	used	 to	supply	 main	power	 to	the	 unit	 via	the	 included	 detach-
able	power	 cord.	The	power	 connection	 uses	an	I.E.C.	 type	connector,	 use	only	 the	supplied,	 polarized	AC	
power	 cord.	Use	only	 a	power	 cord	that	matches	 this	type	 of	connection.	 Be	sure	 to	only	 connect	 this	unit	
to	a	power	 outlet	that	matches	 the	printed	 power	label	on	the	 unit.	 Never	 use	a	power	 cord	when	 the	ground 	
prong	has	been	 removed	 or	broken	 off.	The	 ground	 prong	is	used	 to	reduce	 the	risk	 of	electrical	 shock	in	
case	 of	an	 electrical	 short.	This	cord	 is	designed	 to	fit	in	one	 direction	 only.	Do	not	 attempt	 to	force	 a	cord	 if	
it	does	not	fit,	be	sure	the	cord	is	being	inserted	properly.
     FUSE HOLDER – This	 housing	 stores	the	10	amp	 GMA	 protective	 fuse.	Always	 replace	 with	the	exact	 same	
type	fuse,	 unless	 otherwise	 instructed,	 by	an	authorized	 American	Audio®	service	technician.	 Replacing	with	
any	other	type	of	fuse	than	that	of	the	recommended	fuse	will	void	your	unit	warranty.
 19MXR                      CONTROLS AND FUNCTIONS cont. 
						

							©American Audio®   -   www.americanaudio.us   -   19MXR Instruction Manual Page 14
 19MXR                                                        MIDI TABLE
MXR MIDI interface definitionNOTE: all MIDI messages use channel 1 or channel 2(Shift), Directions \
OUT and IN (LED) are relative to the MixerNOTE: all MIDI messages use channel 1 or channel 2(Shift), Directions \
OUT and IN (LED) are relative to the MixerNOTE: all MIDI messages use channel 1 or channel 2(Shift), Directions \
OUT and IN (LED) are relative to the MixerNOTE: all MIDI messages use channel 1 or channel 2(Shift), Directions \
OUT and IN (LED) are relative to the MixerControl number is in decimal formatControl number is in decimal formatAll rotary VRs start at the minimum in the leftmost position and increas\
e to the maximum when turned clockwiseAll rotary VRs start at the minimum in the leftmost position and increas\
e to the maximum when turned clockwiseAll rotary VRs start at the minimum in the leftmost position and increas\
e to the maximum when turned clockwiseAll rotary VRs start at the minimum in the leftmost position and increas\
e to the maximum when turned clockwiseFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller modeFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller modeFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller modeFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller modeFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller modeFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller mode
DescriptionObjectMIDI DecimalValuesRemarks (Shift)micMIC 1 ON/OFFButton / LED76 / 7600H = released, 7FH = pressedNote on 90H (91H)MIC 1 GAINKNOBXXN/AN/AMIC 1 TREBLERotary VR2100H min to 7FH maxControl change B0H (B1H)MIC 1 BASSRotary VR2200H min to 7FH maxControl change B0H (B1H)REVERB MIC1Rotary VR2300H min to 7FH maxControl change B0H (B1H)REVERB MIC1 PUSHButton / LED61 / 6100H = released, 7FH = pressedNote on 90H (91H)MIC 2 ON/OFFButton / LED77 / 7700H = released, 7FH = pressedNote on 90H (91H)MIC 2 GAINKnobXXN/AN/AMIC 2 TREBLERotary VR2500H min to 7FH maxControl change B0H (B1H)MIC 2 BASSRotary VR2600H min to 7FH maxControl change B0H (B1H)REVERB MIC2Rotary VR2700H min to 7FH maxControl change B0H (B1H)REVERB MIC2 PUSHButton / LED63 / 6300H = released, 7FH = pressedNote on 90H (91H)
MIXERMIDILOG 1 GAINRotary VR000H min to 7FH maxControl change B0H (B1H)MIDILOG 1 TREBLERotary VR100H min to 7FH maxControl change B0H (B1H)MIDILOG 1 MIDRotary VR200H min to 7FH maxControl change B0H (B1H)MIDILOG 1 BASSRotary VR300H min to 7FH maxControl change B0H (B1H)USB / ANALOG 1Slide switch8900H = USB, 7FH = ANALOGNote on 90H (91H)CUE MIDILOG 1Button4200H = released, 7FH = pressedNote on 90H (91H)MIDILOG 1 LINESlide VR400H min bottom to 7FH max topControl change B0H (B1H)MIDILOG 2 GAINRotary VR500H min to 7FH maxControl change B0H (B1H)MIDILOG 2 TREBLERotary VR600H min to 7FH maxControl change B0H (B1H)MIDILOG 2 MIDRotary VR700H min to 7FH maxControl change B0H (B1H)MIDILOG 2 BASSRotary VR800H min to 7FH maxControl change B0H (B1H)USB / ANALOG 2Slide switch9000H = USB, 7FH = ANALOGNote on 90H (91H)CUE MIDILOG 2Button4300H = released, 7FH = pressedNote on 90H (91H)MIDILOG 2 LINESlide VR900H min bottom to 7FH max topControl change B0H (B1H)MIDILOG 3 GAINRotary VR1000H min to 7FH maxControl change B0H (B1H)MIDILOG 3 TREBLERotary VR1100H min to 7FH maxControl change B0H (B1H)MIDILOG 3 MIDRotary VR1200H min to 7FH maxControl change B0H (B1H)MIDILOG 3 BASSRotary VR1300H min to 7FH maxControl change B0H (B1H)USB / ANALOG 3Slide switch9100H = USB, 7FH = ANALOGNote on 90H (91H)CUE MIDILOG 3Button4400H = released, 7FH = pressedNote on 90H (91H)MIDILOG 3 LINESlide VR1400H min bottom to 7FH max topControl change B0H (B1H)MIDILOG 4 GAINRotary VR1500H min to 7FH maxControl change B0H (B1H)MIDILOG 4 TREBLERotary VR1600H min to 7FH maxControl change B0H (B1H)MIDILOG 4 MIDRotary VR1700H min to 7FH maxControl change B0H (B1H)MIDILOG 4 BASSRotary VR1800H min to 7FH maxControl change B0H (B1H)USB/ LINE4/ MIC 3 SWITCHSlide switch7800H = USB or ANALOG, 7FH = MIC3Note on 90H (91H)CUE MIDILOG 4Button4500H = released, 7FH = pressedNote on 90H (91H)MIDILOG 4 LINESlide VR1900H min bottom to 7FH max topControl change B0H (B1H)
XF ASSIGN 1 LeftRotary Select9300H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 2 LeftRotary Select9400H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 3 LeftRotary Select9500H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 4 LeftRotary Select9600H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 1 RightRotary Select9700H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 2 RightRotary Select9800H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 3 RightRotary Select9900H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 4 RightRotary Select10000H = no assign, 7FH = assignNote on 90H (91H)CROSSFADERSlide VR3100H min left to 7FH max rightControl change B0H (B1H)CROSSFADER CURVERotary VR3300H min to 7FH maxControl change B0H (B1H)
CONTROLLER MODEButton / LED10800H = released, 7FH = pressedNote on 90H (91H)MASTERRotary VR2800H min to 7FH maxControl change B0H (B1H)BOOTHRotary VR3000H min to 7FH maxControl change B0H (B1H)CUE MIXRotary VR3400H min (cue/CH1) to 7FH max (master/CH2)Control change B0H (B1H)CUE LEVELRotary VR3500H min to 7FH maxControl change B0H (B1H)
 FILTERFILTER PUSH AButton / LED22 / 2200H = released, 7FH = pressedNote on 90H (91H)FILTER PUSH BButton / LED24 / 2400H = released, 7FH = pressedNote on 90H (91H)FILTER CH ARotary VR3700H min to 7FH maxControl change B0H (B1H)FILTER CH BRotary VR3900H min to 7FH maxControl change B0H (B1H)
LEFT BUTTONSCUE LeftButton / LED12 / 1200H = released, 7FH = pressedNote on 90H (91H)PLAY/PAUSE >|| LeftButton / LED13 / 1300H = released, 7FH = pressedNote on 90H (91H)HOT START 1 LeftButton / LED18 / 1800H = released, 7FH = pressedNote on 90H (91H)HOT START 2 LeftButton / LED19 / 1900H = released, 7FH = pressedNote on 90H (91H)HOT START 3 LeftButton / LED20 / 2000H = released, 7FH = pressedNote on 90H (91H)SYNC LeftButton / LED21 / 2100H = released, 7FH = pressedNote on 90H (91H)
RIGHT BUTTONSCUE RightButton / LED46 / 4600H = released, 7FH = pressedNote on 90H (91H)PLAY/PAUSE >|| RightButton / LED47 /4700H = released, 7FH = pressedNote on 90H (91H)HOT START 1 RightButton / LED52 /5200H = released, 7FH = pressedNote on 90H (91H)HOT START 2 RightButton / LED53/ 5300H = released, 7FH = pressedNote on 90H (91H)HOT START 3 RightButton / LED54 / 5400H = released, 7FH = pressedNote on 90H (91H)SYNC RightButton / LED55 / 5500H = released, 7FH = pressedNote on 90H (91H)
CENTER CONTROLSLOAD LeftButton / LED101 / 10100H = released, 7FH = pressedNote on 90H (91H)LOAD RightButton / LED102 / 10200H = released, 7FH = pressedNote on 90H (91H)LEFT navigateButton10300H = released, 7FH = pressedNote on 90H (91H)RIGHT navigateButton10400H = released, 7FH = pressedNote on 90H (91H)UP navigateButton10500H = released, 7FH = pressedNote on 90H (91H)DOWN navigateButton10600H = released, 7FH = pressedNote on 90H (91H)CENTER ENCODERRotary Encoder523FH=CCW, 41H = CWControl change B0H (B1H)Center encoder PushButton107 00H = released, 7FH = pressedNote on 90H (91H)Shifttouch button / LED109 / 11100H = released, 7FH = pressedNote on 90H  
						

							©American Audio®   -   www.americanaudio.us   -   19MXR Instruction Manual Page 15
 19MXR                                                        MIDI TABLE
MXR MIDI interface definitionNOTE: all MIDI messages use channel 1 or channel 2(Shift), Directions \
OUT and IN (LED) are relative to the MixerNOTE: all MIDI messages use channel 1 or channel 2(Shift), Directions \
OUT and IN (LED) are relative to the MixerNOTE: all MIDI messages use channel 1 or channel 2(Shift), Directions \
OUT and IN (LED) are relative to the MixerNOTE: all MIDI messages use channel 1 or channel 2(Shift), Directions \
OUT and IN (LED) are relative to the MixerControl number is in decimal formatControl number is in decimal formatAll rotary VRs start at the minimum in the leftmost position and increas\
e to the maximum when turned clockwiseAll rotary VRs start at the minimum in the leftmost position and increas\
e to the maximum when turned clockwiseAll rotary VRs start at the minimum in the leftmost position and increas\
e to the maximum when turned clockwiseAll rotary VRs start at the minimum in the leftmost position and increas\
e to the maximum when turned clockwise
For all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller modeFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller modeFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller modeFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller modeFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller modeFor all commands except LED, when in controller mode, add 2 to the chann\
el number when Controller mode is on. Ex: Note on 90H (91H) becomes Note on 92H in controller mode
DescriptionObjectMIDI DecimalValuesRemarks (Shift)micMIC 1 ON/OFFButton / LED76 / 7600H = released, 7FH = pressedNote on 90H (91H)MIC 1 GAINKNOBXXN/AN/AMIC 1 TREBLERotary VR2100H min to 7FH maxControl change B0H (B1H)MIC 1 BASSRotary VR2200H min to 7FH maxControl change B0H (B1H)REVERB MIC1Rotary VR2300H min to 7FH maxControl change B0H (B1H)
REVERB MIC1 PUSHButton / LED61 / 6100H = released, 7FH = pressedNote on 90H (91H)MIC 2 ON/OFFButton / LED77 / 7700H = released, 7FH = pressedNote on 90H (91H)MIC 2 GAINKnobXXN/AN/AMIC 2 TREBLERotary VR2500H min to 7FH maxControl change B0H (B1H)MIC 2 BASSRotary VR2600H min to 7FH maxControl change B0H (B1H)REVERB MIC2Rotary VR2700H min to 7FH maxControl change B0H (B1H)REVERB MIC2 PUSHButton / LED63 / 6300H = released, 7FH = pressedNote on 90H (91H)
MIXERMIDILOG 1 GAINRotary VR000H min to 7FH maxControl change B0H (B1H)MIDILOG 1 TREBLERotary VR100H min to 7FH maxControl change B0H (B1H)MIDILOG 1 MIDRotary VR200H min to 7FH maxControl change B0H (B1H)MIDILOG 1 BASSRotary VR300H min to 7FH maxControl change B0H (B1H)
USB / ANALOG 1Slide switch8900H = USB, 7FH = ANALOGNote on 90H (91H)
CUE MIDILOG 1Button4200H = released, 7FH = pressedNote on 90H (91H)MIDILOG 1 LINESlide VR400H min bottom to 7FH max topControl change B0H (B1H)MIDILOG 2 GAINRotary VR500H min to 7FH maxControl change B0H (B1H)MIDILOG 2 TREBLERotary VR600H min to 7FH maxControl change B0H (B1H)MIDILOG 2 MIDRotary VR700H min to 7FH maxControl change B0H (B1H)MIDILOG 2 BASSRotary VR800H min to 7FH maxControl change B0H (B1H)USB / ANALOG 2Slide switch9000H = USB, 7FH = ANALOGNote on 90H (91H)CUE MIDILOG 2Button4300H = released, 7FH = pressedNote on 90H (91H)MIDILOG 2 LINESlide VR900H min bottom to 7FH max topControl change B0H (B1H)MIDILOG 3 GAINRotary VR1000H min to 7FH maxControl change B0H (B1H)MIDILOG 3 TREBLERotary VR1100H min to 7FH maxControl change B0H (B1H)MIDILOG 3 MIDRotary VR1200H min to 7FH maxControl change B0H (B1H)MIDILOG 3 BASSRotary VR1300H min to 7FH maxControl change B0H (B1H)USB / ANALOG 3Slide switch9100H = USB, 7FH = ANALOGNote on 90H (91H)CUE MIDILOG 3Button4400H = released, 7FH = pressedNote on 90H (91H)MIDILOG 3 LINESlide VR1400H min bottom to 7FH max topControl change B0H (B1H)MIDILOG 4 GAINRotary VR1500H min to 7FH maxControl change B0H (B1H)MIDILOG 4 TREBLERotary VR1600H min to 7FH maxControl change B0H (B1H)MIDILOG 4 MIDRotary VR1700H min to 7FH maxControl change B0H (B1H)MIDILOG 4 BASSRotary VR1800H min to 7FH maxControl change B0H (B1H)USB/ LINE4/ MIC 3 SWITCHSlide switch7800H = USB or ANALOG, 7FH = MIC3Note on 90H (91H)CUE MIDILOG 4Button4500H = released, 7FH = pressedNote on 90H (91H)MIDILOG 4 LINESlide VR1900H min bottom to 7FH max topControl change B0H (B1H)
XF ASSIGN 1 LeftRotary Select9300H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 2 LeftRotary Select9400H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 3 LeftRotary Select9500H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 4 LeftRotary Select9600H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 1 RightRotary Select9700H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 2 RightRotary Select9800H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 3 RightRotary Select9900H = no assign, 7FH = assignNote on 90H (91H)XF ASSIGN 4 RightRotary Select10000H = no assign, 7FH = assignNote on 90H (91H)CROSSFADERSlide VR3100H min left to 7FH max rightControl change B0H (B1H)CROSSFADER CURVERotary VR3300H min to 7FH maxControl change B0H (B1H)
CONTROLLER MODEButton / LED10800H = released, 7FH = pressedNote on 90H (91H)MASTERRotary VR2800H min to 7FH maxControl change B0H (B1H)BOOTHRotary VR3000H min to 7FH maxControl change B0H (B1H)CUE MIXRotary VR3400H min (cue/CH1) to 7FH max (master/CH2)Control change B0H (B1H)CUE LEVELRotary VR3500H min to 7FH maxControl change B0H (B1H)
 FILTERFILTER PUSH AButton / LED22 / 2200H = released, 7FH = pressedNote on 90H (91H)
FILTER PUSH BButton / LED24 / 2400H = released, 7FH = pressedNote on 90H (91H)FILTER CH ARotary VR3700H min to 7FH maxControl change B0H (B1H)FILTER CH BRotary VR3900H min to 7FH maxControl change B0H (B1H)
LEFT BUTTONS
CUE LeftButton / LED12 / 1200H = released, 7FH = pressedNote on 90H (91H)
PLAY/PAUSE >|| LeftButton / LED13 / 1300H = released, 7FH = pressedNote on 90H (91H)
HOT START 1 LeftButton / LED18 / 1800H = released, 7FH = pressedNote on 90H (91H)
HOT START 2 LeftButton / LED19 / 1900H = released, 7FH = pressedNote on 90H (91H)
HOT START 3 LeftButton / LED20 / 2000H = released, 7FH = pressedNote on 90H (91H)
SYNC LeftButton / LED21 / 2100H = released, 7FH = pressedNote on 90H (91H)
RIGHT BUTTONSCUE RightButton / LED46 / 4600H = released, 7FH = pressedNote on 90H (91H)PLAY/PAUSE >|| RightButton / LED47 /4700H = released, 7FH = pressedNote on 90H (91H)HOT START 1 RightButton / LED52 /5200H = released, 7FH = pressedNote on 90H (91H)HOT START 2 RightButton / LED53/ 5300H = released, 7FH = pressedNote on 90H (91H)HOT START 3 RightButton / LED54 / 5400H = released, 7FH = pressedNote on 90H (91H)SYNC RightButton / LED55 / 5500H = released, 7FH = pressedNote on 90H (91H)
CENTER CONTROLS
LOAD LeftButton / LED101 / 10100H = released, 7FH = pressedNote on 90H (91H)
LOAD RightButton / LED102 / 10200H = released, 7FH = pressedNote on 90H (91H)
LEFT navigateButton10300H = released, 7FH = pressedNote on 90H (91H)
RIGHT navigateButton10400H = released, 7FH = pressedNote on 90H (91H)
UP navigateButton10500H = released, 7FH = pressedNote on 90H (91H)
DOWN navigateButton10600H = released, 7FH = pressedNote on 90H (91H)CENTER ENCODERRotary Encoder523FH=CCW, 41H = CWControl change B0H (B1H)
Center encoder PushButton107 00H = released, 7FH = pressedNote on 90H (91H)Shifttouch button / LED109 / 11100H = released, 7FH = pressedNote on 90H  
						

							©American Audio®   -   www.americanaudio.us   -   19MXR Instruction Manual Page 16
 19MXR                              TYPICAL MIXER SET-UP
TU RNTA BLE
This	image	details	a	typical	DJ	Set	Up	consisting	of	a	microphone,	turntables,	CD	players,	and	a	tape	deck.
Note:	Turntables	can	only	be	connected	to	the PHONO LEVEL RCA JACKS.	Be	sure	the	LINE LEVEL 
SELECTOR SWITCHES are	in	the	"PHONO"	position	when	using	turntables.	
T U RNTA BLE 
						

							©American Audio®   -   www.americanaudio.us   -   19MXR Instruction Manual Page 17
 19MXR                                    TYPICAL MIXER SET-UP
Speaker	Cables
Balanced	XLR	male	to	XLR	female	Cables
American Audio V4001™
Typical	Balanced	Output	Set-up
This	image	 details	 a	typical	 stereo	output	 layout.	 Note	the	use	 of	the	 Balanced	 XLR	Jacks	 on	both	
the	 mixer	 and	the	amplifier.		 Always	use	the	balanced	 output	jacks	whenever	 possible.	The	balanced	
output	jacks	should	always	be	used	for	cable	runs	in	excess	of	15	feet.	
Using	the	balanced	jacks	will	ensure	a	clean	signal	through	out	the	entire	audio	system. 
						

							©American Audio®   -   www.americanaudio.us   -   19MXR Instruction Manual Page 18
Due	to	fog	 residue,	 smoke,	and	dust,	 cleaning	 the	mixer	 should	 be	carried	 out	periodically	 to	residue	
build	 up.		
1.			Use	 normal	 glass	cleaner	 and	a	soft	 cloth	 to	wipe	 down	 the	outside	 casing.
2.			Use	 a	cleaner	 specially	 designed	 for	electronics	 to	spray	 in	and	 around	 the	knobs	 and	switch.	 	
	This	 will	reduce	 small	particle	 built	up	that	 can	effect	 the	proper	 operation	 of	the	 mixer.	
3.			Cleaning	 should	be	carried	 out	every	 30-60	 days	to	prevent	 heavy	built	up.
4.	Always	 be	sure	 to	dry	 all	parts	 completely	 before	plugging	 the	mixer	 in.
Cleaning	 frequency	 depends	on	the	 environment	 in	which	 the	mixer	 operates	 (i.e.	smoke,	 fog	residue,	
dust,	 dew).
The	crossfader	is	“Hot	Swapable”	which	means	it	may	be	replaced	at	any	time,	even	when	power	is	
applied.	Only	replace	with	American	Audio	Part	Feather	Fader	Plus.	Replacing	with	any	other	model	
fader	may	seriously	damage	your	mixer.
Replacing	the	Crossfader:
1.		 Disconnect	the	mixers	main	power	supply
2.		 Using	a	number	two	Phillips	screw	driver,	unscrew	the	each	of	the	stainless	steel	retain	screws		
	 that	hold	the	crossfader	in	place.
3.		 Gently	remove	the	crossfader	from	its	seated	position.	You	may	need	to	wiggle	the	crossfader		
	 slightly	to	remove	it.
4.		 After	removing	the	crossfader,	disconnect	the	ribbon	cable	that	attaches	the	crossfader	to	the		
	 PC	board.	Grasp	the	crossfader	by	its	base	and	pull	the	ribbon	cable	by	its	connector	not	the		
	 actual	cables.	The	connector	is	designed	to	only	fit	one	way,	so	don’t	worry	about	the	connec	
 tors orientation.
5.		 Connect	the	new	crossfader	to	the	ribbon	cable	and	replace	in	reverse	order.
 19MXR                                            CLEANING
 19MXR                      CROSS FADER REPLACEMENT 
						

							©American Audio®   -   www.americanaudio.us   -   19MXR Instruction Manual Page 19
 19MXR                            TROUBLESHOOTING
Trouble Shooting: Listed	below	are	common	problems	you	may	encounter,	and	solutions.
There is no power to the unit:
Be	sure	you	have	connected	the	power	cord	to	a	correct	wall	outlet.
There is little or no sound:
1.			Check	the	input	selector	switch.	Make	sure	it	is	set	to	the	device	that	is	currently	playing.
2.			Check	to	see	if	the	connection	cables	are	connected	properly.	
The sound is distorted:
1.		Make	sure	that	the	Gain	level	control	is	not	set	to	high.
Crossfader is not working:
Check	and	see	if	any	channels	have	been	assigned	to	the	crossfader. 
						

							©American Audio®   -   www.americanaudio.us   -   19MXR Instruction Manual Page 20
1-YEAR LIMITED WARRANTY
A.  American Audio®	hereby	 warrants,	 to	the	 original	 purchaser,	 American	Audio®	products	 to	be	 free	
of	manufacturing	 defects	in	material	 and	workmanship	 for	a	period	 of	1	Year	 (365	days)	 from	the	date	
of	purchase.	 This	warranty	 shall	be	valid	 only	if	the	 product	 is	purchased	 within	the	United	 States	of	
America,	 including	 possessions	 and	territories.	 It	is	 the	 owner’s	 responsibility	 to	establish	 the	date	 and	
place	of	purchase	by	acceptable	evidence,	at	the	time	service	is	sought.	
B.		For	 warranty	 service,	send	the	product	 only	to	the	 American	 Audio®	factory.	 All	shipping	 charges	
must	be	pre-paid.	 If	the	 requested	 repairs	or	service	 (including	 parts	replacement)	 are	within	 the	terms	
of	this	 warranty,	 American	 Audio®	will	 pay	 return	 shipping	 charges	only	to	a	designated	 point	within	
the	United	 States.	 If	the	 entire	 instrument	 is	sent,	 it	must	 be	shipped	 in	its	 original	 package.	 No	acces-
sories	 should	 be	shipped	 with	the	product.	 If	any	 accessories	 are	shipped	 with	the	product,	 American	
Audio®	shall	have	 no	liability	 whatsoever	 for	loss	 of	or	 damage	 to	any	 such	 accessories,	 nor	for	the	
safe	return	thereof.		
C.		This	 warranty	 is	void	 if	the	 serial	 number	 has	been	 altered	 or	removed;	 if	the	 product	 is	modified	 in	
any	manner	 which	American	 Audio®	concludes,	 after	inspection,	 affects	the	reliability	 of	the	 product;	
if	the	 product	 has	been	 repaired	 or	serviced	 by	anyone	 other	than	the	American	 Audio®	factory	 unless	
prior	written	 authorization	 was	issued	 to	purchaser	 by	American	 Audio®;	if	 the	 product	 is	damaged	
because	not	properly	maintained	as	set	forth	in	the	instruction	manual.	
D.		 This	 is	not	 a	service	 contract,	 and	this	warranty	 does	not	include	 maintenance,	 cleaning	or	peri-
odic	 check-up.	 During	the	period	 specified	 above,	American	 Audio®	will	 replace	 defective	 parts	at	
its	expense,	 and	will	absorb	 all	expenses	 for	warranty	 service	and	repair	 labor	by	reason	 of	defects	
in	material	 or	workmanship.	 The	sole	 responsibility	 of	American	 Audio®	under	 this	warranty	 shall	be	
limited	 to	the	 repair	 of	the	 product,	 or	replacement	 thereof,	including	 parts,	at	the	 sole	 discretion	 of	
American Audio®.	All	 products	 covered	by	this	 warranty	 were	manufactured	 after	January	 1,	1990,	 and	
bear	identifying	marks	to	that	effect.	
E.  American Audio®	reserves	 the	right	 to	make	 changes	 in	design	 and/or	improvements	 upon	its	prod-
ucts	without	any	obligation	to	include	these	changes	in	any	products	theretofore	manufactured.	
F.		 No	 warranty,	 whether	expressed	 or	implied,	 is	given	 or	made	 with	respect	 to	any	 accessory	 sup-
plied	with	products	 described	 above.	Except	 to	the	 extent	 prohibited	 by	applicable	 law,	all	implied	
warranties	 made	by	American	 Audio®	in	 connection	 with	this	product,	 including	 warranties	 of	mer-
chantability	 or	fitness,	 are	limited	 in	duration	 to	the	 warranty	 period	set	forth	 above.	 And	no	warran-
ties,	 whether	 expressed	 or	implied,	 including	 warranties	 of	merchantability	 or	fitness,	 shall	apply	 to	
this	product	 after	said	period	 has	expired.	 The	consumer’s	 and	or	Dealer’s	 sole	remedy	 shall	be	such	
repair	 or	replacement	 as	is	expressly	 provided	above;	and	under	 no	circumstances	 shall	American	
Audio®	be	 liable	 for	any	 loss	 or	damage,	 direct	or	consequential,	 arising	out	of	the	 use	 of,	or	inability	
to	use,	this	product.	 
G.		 This	 warranty	 is	the	 only	 written	 warranty	 applicable	 to	American	 Audio®	Products	 and	supersedes	
all	prior	warranties	and	written	descriptions	of	warranty	terms	and	conditions	heretofore	published.	
The	 19MXR	 carries	a	one	 year	 limited	 warranty.	 We	recommend	 you	fill	out	 the	enclosed	 warranty	card	to	
validate	 your	purchase.	 All	returned	 service	items	whether	 under	warranty	 or	not,	 must	 be	freight	 pre-paid 	
and	accompany	 a	R.A.	 (return	 authorization)	 number.	If	the	 mixer	 is	under	 warranty,	 you	must	 provide	 a	
proof	 of	purchase	 invoice.	You	may	 obtain	 a	R.A.	 number	 by	contacting	 our	customer	 support	team	on	
our	 toll	free	 number.	Please contact American Audio® customer	 support	at	(800)	322-6337 for	 a	
R.A.	 number.	All	 package	 not	displaying	 a	R.A.	 number	 on	the	 outside	 of	the	 package	 will	be	
returned	 to	the	 shipper.
 19MXR                                                         WARRANTY